Comparison

Flight parameters vs World Time Clock Master

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Flight parameters

Features
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Calculation of standard ISA atmospheric parameters (pressure, density, temperature) Calculation of QNH altitude Calculation of MSA correction for off-standard atmospheres Conversion of calibrated air speed to mach number

About

World Time Clock Master

Effortlessly manage multiple time zones with this app. Convert times instantly, schedule events, and view global clocks at a glance with interactive widgets. Features atomic accuracy and a vast database of locations.

Highlights
  • Multiple time zone display
  • Interactive time conversion
  • Event scheduling
  • Atomic time accuracy
  • Dynamic home screen widgets
  • List mode for text view
  • Real moon phases and sunrise/sunset
Features
Read full description

THE EASIEST WAY TO DEAL WITH MULTIPLE TIMEZONES + INTERACTIVE WIDGETS Sick of screwing up meeting times and missing calls? This app cuts through time-zone confusion and hands you the perfect hour at a glance. Forget guesswork — just click, connect, and impress. KEY FEATURES EVENT SCHEDULING MADE EASY Found the perfect meeting time? Add events to your calendar with just a tap, and never miss an international webinar, call, or special moment again. ATOMIC ACCURACY No drift, no guesswork. Each second syncs with the atomic standard, so you can trust every moment. Extensive Time Zone Database: Tap into over 160,000 locations and time zones including GMT, UTC, and more. UNIFIED CLOCK FACE View all your essential time zones at a glance on one beautifully designed, customizable clock face. Whether you prefer digital or analog displays (or even military time), everything is exactly where you need it. INTERACTIVE TIME CONVERSION Convert times instantly by simply twisting or swiping across the clock face. Watch as your selected time zones update in real time—making planning international calls, meetings, or travel effortless. DYNAMIC WIDGETS Access global times without even opening the app. Our interactive home screen widget lets you drag a simple line to reveal and convert times, ensuring you’re always in sync no matter where you are. LIST MODE Get a clean, text-based view of all your cities in one column. See times and dates at a glance, and scroll to check future or past hours. It’s a no-fuss way to track the world’s clocks. FEELS LIKE A LUXURY TIMEPIECE We poured effort into details most people never notice — and we’re okay with that. Our users aren’t “most people.” Details include: — Real Moon Phases — Real Moon Rotation — Real Sunrise & Sunset — Advanced City Lights — Haptic Feedback * * * World Clock Master offers a premium subscription: Subscribe to get access to unlimited timezones, interactive widgets, customizations, and timely automatic updates of our timezone database of more than 160,000 locations and timezones. – Length of subscription: 1 month or 1 year – Payment will be charged to iTunes Account at confirmation of purchase – Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period – Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal – Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase – Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable – Terms & Conditions: https://timemaster.s3.amazonaws.com/Time-master-terms.pdf

Screenshots

Flight parameters2 screens
World Time Clock Master4 screens

Verdict

The call

The clearest difference is price: World Time Clock Master at Free against Flight parameters's $2.99. Flight parameters's advantage is in-app purchases (none vs 13) and iOS requirement (15.4 vs 17.0). On update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

World Time Clock Master is free to download; Flight parameters costs $2.99 up front. World Time Clock Master sells 10 in-app purchases, starting at $2.99 per month. Flight parameters asks for nothing beyond the download.

UpkeepUpdate frequency

Flight parameters ships an update every 3 weeks, World Time Clock Master fortnightly. Both last shipped on October 12, 2026.

Scorecard3 real differences · 7 level
Flight parameters versus World Time Clock Master: the parameters behind the verdict, then further details
ParameterFlight parametersWorld Time Clock Master
Price$2.99Free — better
Rating—4.6 (816 ratings) — better
Positive reviews—65.8% of reviews
Number of ratings—816 — better
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Subscription
DevicesiPhone, iPodiPhone, iPad, Vision Pro — better
Requires iOS15.4 — better17.0
Further details — not scored
Size1 MB236 MB
Age rating4+4+
DeveloperKonstantinos LadiellisAlex Komarov Inc.

Bugs and requests

Flight parameters

Not enough reviews yet to summarise bugs or requests.

World Time Clock Master

Reported bugs

4 issues
  • Lose all the registered locations after updating the app
  • Sticky signup interface
  • Widget doesn't work
  • GMT and London currently have a 1 hour time difference between the two locations, but the app shows them the same time

Requested features

4 requests
  • Add the time difference in hours between the default location and other locations in both the widget and the app
  • See my calendar events on the dial
  • Make a paid tier that doesn't collect my data
  • Add new event to a Calendar

In-app purchases

None

Flight parameters

No in-app purchases

10 purchases

World Time Clock Master

Subscriptions6
  • 1 month3 variants$2.991 Month
  • 3 months$3.993 Months
  • 1 year1 Year trial2 variants$11.991 Year
Show 3 more
  • 1 year3 Days trial$11.991 Year
  • 1 year$11.991 Year
  • 1 year3 Days trial$19.991 Year
One-time4
  • Lifetime$29.99
  • Lifetime$49.99
  • Lifetime$79.99
Show 1 more
  • Lifetime$99.99

Questions

Is Flight parameters free?
Flight parameters costs $2.99, with no in-app purchases.
Is World Time Clock Master free?
World Time Clock Master is free to download, with in-app purchases available.
Do Flight parameters or World Time Clock Master have ads?
Neither Flight parameters nor World Time Clock Master shows ads.
Which is updated more often, Flight parameters or World Time Clock Master?
Flight parameters ships an update every 3 weeks, and World Time Clock Master fortnightly. Most recently, Flight parameters was updated on October 12, 2026 and World Time Clock Master on October 12, 2026.

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